public SystemItem[] GetChildren(ItemIdentifier itemId)
        {
            //encrypt login and password
            string loginName = "";
            string pass = "";
            getloginAndPass(UserId, ref loginName, ref pass);
            string _url = getWSUrl(this.Url);

            RepositoryWebservice repo = new RepositoryWebservice(_url);
            var children = repo.GetChildren(itemId, loginName, pass);
            repo.Dispose();

            return children;
        }